support W3C DID (#452)

* Add support for readonly and on-chain identities. Initial work on parsing of DIDs with other DID methods

* Create new type w3c did  wich is a wrapper around github.com/build-trust/did compatible with old DID type

* Make Decompose method a separate function

* Removed CoreID method from DID and replace id with helper function CoreIDFromDID

* Remove NetworkID & Blockchain DID methods. Use Decompose method instead.

* Refactor working with method byte, remove some redundant ID methods.

* return error from IDFromDID if we know the DID method, but still can't parse ID

* Getting rid of unknown ID type

* Fix encoding ethereum address to/from genesis

* move W3C did to separate package

* remove dependency on onChainMethods dict

* make readonly networkID empty string

* remove unneeded public constant

* Rename did package to w3c. Rename did.Parse function to w3c.ParseDID. Rename IdGenesisFromIdenState func to NewIDFromIdenState. Rename DIDGenesisFromIdenState to NewDIDFromIdenState. Rename DIDFromGenesis to NewDID.

* add sepolia testnet (#453)

---------

Co-authored-by: Oleksandr Brezhniev <[email protected]>

claim_test.go

@@ -14,7 +14,6 @@ import (
 
 	"github.com/iden3/go-iden3-crypto/poseidon"
 	"github.com/iden3/go-iden3-crypto/utils"
-	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
@@ -389,8 +388,7 @@ func TestNewSchemaHashFromHex(t *testing.T) {
 	exp, err := hex.DecodeString(hash)
 	require.NoError(t, err)
 
-	assert.Equal(t, exp[:], got[:])
-
+	require.Equal(t, exp[:], got[:])
 }
 
 func TestSchemaHash_BigInt(t *testing.T) {
@@ -402,8 +400,7 @@ func TestSchemaHash_BigInt(t *testing.T) {
 
 	got := schema.BigInt()
 
-	assert.Equal(t, exp, got)
-
+	require.Equal(t, exp, got)
 }
 
 func TestGetIDPosition(t *testing.T) {